When the screen is blue don't panic



1. Go to the Apple menu and select system preferences



2. Click on Displays







3. On the screen that says EPSON PJ  Hold down the "alt" key on your keyboard (option key on a mac) and click on scaled. 

Then release the alt key and select 1280x800 










Afterwards you screens will flash and everything should be back to normal.



And now you know what to do when the screen is blue.